Ventilator



Dec. 27; 1938. I. RAVVEN 2,141,762

VENTILATOR Filed March 6, 1936 2 Sheets-Sheet l fnven Le f V re 7 ttorney L. l. RAVVEN VENTILATOR Filed March 6, 1936 2 ts sheet 2 Fig, 34

luveu'ior Lea I p a Patented Dec. 27, 1938 ginger PATENT OFFECE VENTILATOR Leo I. Ravven, Boston, Mass, assignor to Air- O-Matic Ventilator Company, Roxbury, Mass.

Application March 6,

1 Claim.

The present invention relates to a means for aiding ventilation, and may be applied to openings from the exposed atmosphere to a building or in any position where a window, door, transom or opening may exist.

The present invention is particularly useful in producing a diffused flow of air from the outside into a heated room and in such a manner that very little or no draft will be felt, and that rain or snow will be excluded.

The present invention is particularly applicable as an insertion in an open window or an open door, and in the present application particularly, may be applied to different types and sizes of windows and be inserted either permanently or removeably wherever it is necessary or desirable.

The advantages of the present invention will be more fully understood and appreciated by a consideration of the embodiment described in the specification below and taken in connection with the drawings.

In the drawings, Figure 1 shows a front elevation of a window with the invention in place.

Figure 2 shows an enlarged view of the center rotating element indicated in Figure 1.

Figure 3 shows a sectional view taken through the center of Figure 2, on the line 33.

Figure 4 shows a face view of 'a detail.

Figure 5 shows a section on the line 5-5 of Figure 4.

Figure 6 shows a vertical view of a modification indicated in Figure 1.

Figure '7 shows a still further modification of a detail.

Figure 8 shows a detail of an element indicated in Figure '7.

Figure 9 shows the detail indicated in Figure 8 from a side view.

Figure 10 shows an enlarged section of the center of the rotating unit shown in Figures 2 and 3, and,

Figure 11 shows a further detail of a modification.

The invention may be inserted in the lower part of the window as shown in Figure 1 beneath the lower glass frame when in a raised position. It comprises a wall or plate member I which may be of glass and transparent, translucent, or opaque and of any suitable material. The plate member I may be surrounded by frame elements 2, 3, 4 and 5. The elements 3 and 4 may be made to extend outward to the sides of the window frames 6 and I so as to fill up the entire space at the sides of the device when the window is opened. The entire frame may be made in a length longer 1936, Serial No. 67,518

than necessary for the ordinary Windows, and it may be cut to size by cutting or trimming off one or more of the side pieces 8, 8, which may be made as one piece and grooved by grooves 9, 9, so that the pieces 8, 8, may easily be severed from the frame. At the center of the plate or wall I, there is provided a perforation in which may be inserted the assembly I0 containing the rotating element as will presently be described.

The unit I 0 comprises a frame made of two pieces I I and I2 which are cylindrical in shape with an outwardly extending flange I3, I3, and an inwardly extending flange I4 and I5, the flanges I4 and I5 actually forming an outwardly facing fiat ring parallel with the surface of the wall or plate I. The unit is set into the wall by clamping the wall between the outwardly extending flanges I3, I3, by means of the nuts and bolts I6, IE, or by riveting or in any other suitable manner. Across the outer faces I4 and I5, there is mounted a flat bar I'I, I7, passing through the center of the opening. The rotor within the unit is pivoted in this bar. This rotor I8 is formed of a flat molded Celluloid piece having radially extending bars I 9 extending from a center hub and joining in an outer ring 2I. These bars l9 support the outwardly extending flaps or vanes 22 which are pressed from the flat Celluloid piece leaving perforations or openings between the bars I9, II). The hub 20 and the rest of the elements just described are shaped from a single piece of Celluloid, the center hub being coned or hemispherically shaped as indicated by 23 particularly in Figure 10 and is formed to grip the shaft 24, the ends 25 and 26 of which are mounted in the bars I1, I1.

On the other side of the Celluloid rotor at the center is another cap or cone 2'1, preferably made of metal and substantially the same size as the Celluloid center hub. This cap is provided with a flat flange 28 abutting the Celluloid surface and is held fast to it by means of the clamping fingers 29 which pass through the Celluloid rotor at the vane openings. As many of these fingers may be formed on the cone 2'! as is necessary to obtain a good support. The shaft 24 may be cemented into the cone 2'! so that the shaft will move with the cone.

As indicated in Figure 2 there is provided an outerCelluloid ring 2| extending well within the frame formed by the pieces I I and I2. The vanes 22 may be extended inwardly or outwardly but are preferably extended inwardly or away from the direction of the draft, so that in Figure 1, assuming the device is viewed from the inside towards which the air is flowing, the rotation of the vanes will be clockwise.

The rotor is preferably made of Celluloid and the rest of the parts of aluminum, with the exception of the shaft element, which I have found suitable to make of wood, such as lignum vitae.

In this manner the device is not only impervious to moisture and will not rust, but is extremely light, and lends to a low cost of manufacture.

As indicated in Figures 4 and 5 I'may employ a front cover 30 which may be pivoted'to the frame piece l4 by means of a pivot 31. The cover may also be provided with a handle 32 so that it may easily be opened or closed. This covermay be arranged as indicated in .the modification shown in Figure 6 wherein a. cordg33 is, provided attached to the handle 32 and having at one end a ring 34 to provide a simple .gripfor. the'finger. The cord 33 is preferably wrapped or tied around the handle 32 and passed upward through an 'eye 35 in the frame and then-over tovanother'eye 36 on the other:side of theventilator;.andthen allowed to hang downward as indicated by the end 31 with the ring 38 attached thereto.

In. the modification shown in--Figure 6,. the end elements 39, 39 are-detachable from the frame to which they are nested. by means of locking elements 40 which project from oneside ofthe'end strips 39 into a corresponding position in the next end strip. In each :case. a finalffini'shing. strip is provided as indicated air-4 I. The arrangement shown in" Figures lzand 6-may also :be permanently applied to the window. This isaaccome plished by the use of asetfixture shown in-Figures 8 and 9 and shown as applied in-Figure 7.

The side fixture 42 is a. board or bar that 'is' grooved on the outside edgeiandprepared. toreceive the entire frame. This end piece 42 is provided with a, groove 43 by the extending side walls 44, 44, and the pieceitself maybe held to the frame with a single screw 45 in sucha manneras to act .as a, pivot and allow the framexto. be. appliedrin an inclined fashion against the lower crossjpiece of-the window itself. a

In place of building the frame with? side extensions as shown inFigures 1 and 6, anextensible end piece as indicatediniFigure llmayberused. This piece 46 is bent over onitself at the edge to form a slideway for the frame asindicatedat- 41, while at the opposite side there isprovided a: pivoted slideway 48 pivoted to'the-end piece =4B:b-y means of the pivot-49. The outer end of the piece .lline; and be providedwith-similar shots as 52 to properly weight and balance the rotor element.

.If desirable, there may also be provided in the frame element as indicated in Figure 2, a clutch 0!.1'Sl201) piece 53 pivoted to the frame at 54. This stop .piece is used in its upright position to pre- --vent vthe rotor from going around and when thrown to the right from the position in Figure 2, -allowslthe rotor to turn freely about.

The. invention when installed in a window or the like will operate on a very small difference in -pressure,:since thev rotor;is constructed of such light material.

The cylinders H and I2 may be providedwith'drain holes to effect drain of Water that may settle from rain or the like when installed.

When operating, the vanes being inclined outwardly ata' substantial angle, will diffuse the air for a considerable" area and greatly facilitate a constant and uniform flow.

The device may be allowedto remainrpermanently in the window frame or 'may be removed. If allowed to remain permanently in the window frame the air flow may be regulated not only by the stop element 53 but also by means of the cover 30 which may be opened as much as desired.

Having now described my invention, I claim:-

' In .a ventilating device of the type described, a Celluloid rotor comprising a flat disc having vanes formed of radial sectorsinclined at an angle to the plane of the disc and afcenter hub bearing element formed with one convex face constituting anintegral part ofsaid Celluloid disc, a convex ,member opposite said convex face having clampingfingers atthe edges thereof clamping over the vanes attheir inner vertices'said hub elements forming an enclosed space'having afield therein of plastic material and a weight element at one side thereof and shaft means positioned centrally in said hub and held rigidly in place by said plastic means.

LEO. I. 'RAVVEN. 

